They are reusable. There is an initial "just add water" setup to change the dry powder to gel, then you throw them in the freezer for several hours and they are ready for use.

Set of 5 Cooler Shock Lunch Bag Size ice Packs - high Performance 18 Degree Fahrenheit Using Phase Change Science to Achieve 8-10 Hour Cooling - Avoid spoilage so You can eat Your Lunch!

Set of 5 Cooler Shock Lunch Bag Size ice Packs - high Performance 18 Degree Fahrenheit Using Phase Change Science to Achieve 8-10 Hour Cooling - Avoid spoilage so You can eat Your Lunch!

Q: How long do these stay frozen for ?

Mine have stayed frozen for approximately 9-10 hrs. I left food in the cooler,which was well-insulated, and it which was still cold when I got home. This was kept in office setting with temps in room in the 70’s.

Q: When you say that this item is colder than ice, what does that mean? ice can be cooled to any temperature unless i'm mistaken. a rock can be 18*f.

Karæthon's answer is correct. Freezing or melting overcomes the "latent heat of fusion" which is about the same heat as is required to raise the temperature of (for example) liquid water by almost 80°F, or frozen water (ice) by about 150°F. So an ice pack in a cooler will spend most of its time at it's melting point. Once it's all melted, the subsequent temperature rise will be very quick.

Q: If I were to use two of these together, would I have similar cooling capacity as one of the medium-sized packs?

Not positive of that but I am amazed at how well these things work. 4 of them keeps a large cooler super cold.

4.6/5

Product ID: 150500725

Secure Transaction

Details

Brand
Cooler Shock
Material
Polyester
Package Information
Bag
Item Weight
0.6 Pounds
Special Feature
Portable

⏳8-10 hours cooling

🎒ultra-portable design

❄️18°F phase change tech

Frequently Bought Together

Cooler Shock Reusable Ice Packs for Cooler - Long Lasting Cold Freezer Packs for Coolers and Lunch Boxes - Cooler Ice Packs for Camping Gear, Fishing, Road Trips, Beach Must Haves

Cooler Shock Ice Packs - Reusable, Premium, Large Pack and Lunch Set for Long Term Use - Cools Faster Than Ice - Cooler Accessories

Cool Coolers by Fit + Fresh Slim Compact Reusable XL Ice Pack, Perfect for Lunch Boxes, Coolers, and Beach Bags

Description

❄️ Keep your cool, wherever the day takes you!

STAY CHILL ALL DAY - Advanced phase change material keeps your lunch perfectly cold at 18°F for up to 10 hours.
NCAA APPROVED STYLE - Solid pattern with official league branding adds a subtle touch of sporty sophistication.
LIGHTWEIGHT PORTABLE - Weighing just 272g with a convenient shoulder strap, it’s designed for on-the-go professionals.
DURABLE POLYESTER BUILD - Rugged polyester exterior ensures long-lasting use during your outdoor adventures or daily commute.
VERSATILE OUTDOOR COMPANION - Ideal for picnics, hiking, fishing, or office lunches—never compromise on freshness.

The Cooler Shock Set of 5 Ice Packs uses cutting-edge phase change technology to maintain a consistent 18°F temperature for 8-10 hours. Crafted from durable polyester and weighing only 272g, these portable ice packs come with a shoulder strap for easy transport. Perfect for professionals and outdoor enthusiasts alike, they ensure your lunch stays fresh and spoilage-free during picnics, hikes, or daily commutes.

Specifications

Brand	Cooler Shock
Material	Polyester
Package Information	Bag
Item Weight	272 g
Special Feature	Portable
Included Components	Shoulder Strap
Recommended Uses For Product	Picnic, Outdoor, Fishing, Hiking
Pattern	Solid
League	ncaa
UPC	854850006251
Item part number	43237-2
ASIN	B078FR9CND

Have a Question? See What Others Asked

How long do these stay frozen for ?

When you say that this item is colder than ice, what does that mean? ice can be cooled to any temperature unless i'm mistaken. a rock can be 18*f.

Are these reusable?

If I were to use two of these together, would I have similar cooling capacity as one of the medium-sized packs?

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Zainab N.

Fantastic and great service. Shipping was faster than expected.

1 week ago

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

A$3

Duties & taxes incl.

Australiastore

Free Shipping

with PRO Membership

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

View all Trustpilot reviews